Stapling machine



May 3, 1949.

Filed Dec. 8, 1945 W. SCHAFROTH STAPLING MACHINE 4 Sheets-Sheet l m5ATTO'RNEY May 3, 1949. w. SCHAFROTH 2,469,055

' STAPLING MACHINE Filed lbe 8, 1945 4 Sheets-Sheet 2 Fla 2 ,2

INVENTOR: ligmrmficmffiqm H5 ATTORNEY 4 Sheets-Sheet ,5

STAPLING MACHINE w. SCHAFROTH May 3, 1949.

Filed Dec.

' INVENTOR. My: 501M007 H/sATwR/m 'May 3, 1949. w. SCHAFROTH STAPLINGMACHINE 4 Sheets-Sheet 4 Filed Dec. 8, 1-945 INVENTOR:

Hlb ATTORNEY Patented May 3, 1949 STAPLING MACHINE Werner Sohafroth,Brookline, Pa., assignor' to International Staple and Machine Company;Clifton Heights, Pa, a corporation of Pennsylvania Application December8, 1945, Serial No. 633,677

7 Claims.

This invention relates to stapling machines and particularly to the typeof machine that is used to secure the flaps or ends of closed cartons orcontainers where rotatable anvils are used for penetrating the materialand clinching the staples, and where it is desired to adjust thepenetration of the anvils into the material.

The invention is an improvement over similar machines of my priorpatents, No. 2,080,634, dated May 18, 1937, and No. 2,234,808, datedMarch 4, 1941, in that means is incorporated in the ma chine foradjusting the distance the piercing anvil's penetrate into the material.

The stapling machine of the type with which this invention is concernedincludes, as characteristic elements, a pair of penetrating anvils thatare actuated by suitable operating instrumentaliti'es, and in particularinstrumentalities by which the distance between the axes of the anvilsand the face of the material from which the staples are driven beadjusted, as with this distance increased or decreased the amount ofpenetration of the piercing anvils may be regulated.

The purpose of the invention is to provide mechanical means in astapling machine having rotary piercing anvils for limiting the amountof penetration of the said anvils into material upon which the machineis used.

Owing to the varied uses of stapling machines of this type wherein themachines may be used for stapling relatively thick materials, such ascorrugated board, at one time and relatively thin materials, such aspasteboard of nominal thick ness, at another, it has been foundnecessary to provide means for regulating the distance the piercinganvils extend into the material, as where relatively thin materials areused the anvils may damage the contents of the container.

I-he object of this invention is, therefore, to control the amount ofpenetration of piercing anvils into material for clinching staples bymaking it possible to adjust the distance between the the axes of thepiercing anvils and the face of the material being stapled.

The invention is primarily concerned with stapling' machines whereinstaples are driven from the surface of flaps, ends of cartons, and thelike, through the said flaps and against anvils extending from themachine, and positioned in the path of the staples on the inside of thematerial, or a machine wherein the staples are first driven into placeand then clinching means is operated to pierce the materials, bend overthe ends of the staples and then clinch the ends ofv the staples againstthe: inner surface of the material.

Another object ofthis invention is to providemeans for adjusting thedistancepi'ercing anvils of a stapling machine penetrate into materials"being stapled, which may beincorporate'd in present types of machines;

A further object of the invention is to provide means for adjusting thepenetration of piercing a As in materials being stapled, which maybe oerated from a common point to adjust both sides of the machine.

A still further object of the invention is to provide adjusting meansforregul'ating the penetration of piercing anvils of stapling machinesinto in terial which is of substantially rigid construction whereby theparts will withstand shock and relatively hard wear.

With these and other objects in view, the invention embodies a pair oflegs slidably mounted in a stapling machine with means adjusting thedistance the legs may extend beyond the limits of the machine, or meansadjusting the distance between the axes of clinching anvils and the endof the machine so that the'distance rotary operating anvils maypenetrate into materials being stapled may be adjusted,

For a full and more'complete understanding of the invention reference.may be had to the following description and: accompanying drawingswherein:

Figure l is a view showing a side elevation of the stapling machine withthe head or vertical part shown in section.

Figure 2 is a view showing a: front elevation of the machine with thefront plate removed, illustrating the relativepositions of'the anviloperating instrumentalities before downward movement oi the plungerstarts.

Figure 3 is a similar view illustrating the second positions of theparts in which the anvils have been actuated to operative positions.

Figure 4 is also a similar view illustrating thecontinued travel of theplunger wherein the staple Figure 5 is a view showing. a rear elevationof' the machine with the staple bar shown in section, illustrating analternate design. in which elevating plates are operated in unison.

Figure 6 isaview showing.- the rear elevationof the machine withtheupper' par-t brokenaway and with the staple bar in; section,illustrating another alternate design: in which. the. distance.-

between the axes of rotating anvils and the end of the machine may beadjusted.

Referring now to the drawings wherein like reference characters denotecorresponding parts, a stapling machine made in accordance with thisinvention is illustrated wherein numeral 10 indicates the casing of themachine, numeral ii a leg at the rear of the machine through whichstaples are provided to the feeding mechanism, and numeral [2 a handleby which the machine may be operated.

The casing I is illustrated as being of rectangular shape in crosssection, although it may be of any suitable shape, and in the lower partis a partition l3 in which staple clinching anvils l4 and I5 arerotatably mounted on shafts I5 and II. On the ends of the shafts l6 andI! are arms l8 and I9, which are connected by links 20 and 2| to links22 and 23, as shown, and the upper ends of the links 22 and 23 arepivotally mounted on a pin 24. Rollers 25 and 26 are mounted on thelinks and at the pivotal connections between the links 20 and 2|, andthe links 22 and 23, providing operating means through which the linksmay be operated by cam grooves 21 and 28 in the plunger 29 into whichthe rollers extend. The cam grooves are in the face of the slidingplunger 29, which is operated by the handle [2, the handle beingpivotally connected to the plunger between ears 38 at the upper endthereof through a pin 3| and pivotally mounted through a link 52, toears 33 on the front of the casing.

The plunger 29 is provided with an extending plate 34 which, as theplunger is moved downward, drives a staple 35 into material againstwhich the machine is placed. The staples may be fed by a follower 36 ofthe usual type through the leg H or by any means.

In order to adjust the penetration of the piercing anvils I4 and i5,plates 3'5 and 38, as illustrated in dotted lines in Figure 2, areslidably mounted in the casing and these may extend beyond the end ofthe casing providing legs therefor, as illustrated in Figure 2. Theseplates may be adjusted by adjusting nuts 39 and 40 on the opposite sidesof projections 4! at the sides of a bail or handle 42. The nuts 39 and4%) are screwed on threaded stems 43, extending upward from the ends ofthe plates. These parts are similar on opposite sides of the machine sothat the same reference numerals apply to both. The nut 40 may be rundown on the thread and then the nut 39 tightened to draw the legsinward, and the operation of the nuts may be reversed to force the legsoutward to the position illustrated in Figure 2. By this means, theelevation of the base of the machine may be adjusted in relation to thesurface of materials upon which the machine is used, whereby thepenetration of the anvils into the materials may be adjusted. As theplunger travels downward, as shown in Figures 2, 3, and 4, the plate 29also travels downward, carrying the rollers 25 and 26, which first moveinward toward the center, travelling in the horizontal sections at thelower ends of the grooves 21 and 28. In this movement, the anvils areactuated from the position shown in Figure 1 to that shown in Figure 3,and as the rollers 25 and. 2B are retained in these positions by thevertical sections of the slots 21 and 28, the anvils will be held intheir operative positions. Then with the continued downward movement ofthe plunger, the vertical sections of the grooves 21 and 28 passdownward over the rollers, permitting continued travel of the plungerand staple clinching plate 34, and the downward travel of the plate 34is only limited by the engagement of the lower end thereof with anobstruction, or until the upper ends of the vertically disposed sectionsof the grooves 21 and 28 reach the rollers. It will be noted in Figure 4that the grooves 27 and 28 have sufficient length to permit the lowerend of the plunger to pass beyond the base of the machine.

An alternate form of the invention is illustrated in Figure 5 whereinthe sliding plates are indicated by the numerals 44 and 45, and theseare moved upward and downward by levers 46 and 41 pivotally mounted onpins 48 and 49 on the back of the machine. The ends of the levers areprovided with slotted holes 50 and 5! into which pins 52 and 53, fixedlymounted on the plates 44 and 45 extend, and as the ends of the leversmove upward the pins will travel upward in slots 54 and 55 in the backof the casing. The levers 46 and 47 are pivotally attached to the headof a screw 56 through a pin 51, and the screw is mounted between ears 58and 59, having an adjusting nut 60 thereon to move the screw upward anddownward to adjust the position of the plates 44 and 45 through thelevers. In this design the adjusting nut GI) may be turned and this willin turn slidably operate the plates 44 and 45 so that both may be movedin unison exactly the same distance.

In the design shown in Figure 6, adjusting means is provided at the rearof the machine to raise and lower a partition 6| corresponding to thepartition is shown in Figure 1 and in which anvils t2 and 63 are mountedthrough shafts 64 and 65. The partition 6! is vertically slidable ingrooves 66 and 5'! in which the plunger 29 also travels and the positionof the partition may be adjusted by knobs 58 and 69 on the ends oflevers ill and ll, which are pivotally mounted in the casing throughshafts i2 and #3 extending inward through the rear of the casing. Theknobs t8 and to extend into slots 14 and F5 in the partition 6!, and asthese knobs travel upward and downward by turning the adjusting nut toon a screw it they will in turn operate the partition so that it willmove upward and downward, thereby changing the distance between the axesof the shafts 64 and 55 and the base of the casing, the casing beingindicated by the numeral 18.

The screw 1'? is provided with traveling nuts 19 and and to these, arms8i and 82, extend ing upward from the shafts 12 and 13 are pivotallyconnected by pins 83 and 84. The screw l? is rotatably held in ears 85and 8'6 on the back of the casing and is provided with right hand screwthreads at one end and left hand threads at the other. It will beunderstood that these levers with their actuating instrumentalities maybe arranged in any other manner whereby the axes of the anvils may beadjusted in relation to the end or face of the machine.

The construction of the machine will be readily understood from theforegoing description. The

machine may be provided as shown and described in any of the variousdesigns and, by adjusting the plates or legs, or the partition in whichthe piercing anvils are mounted, the amount of penetration of the anvilsinto materials may be adjusted to compensate for materials of differentthicknesses and also materials of different compositions.

While a preferred specific embodiment of the invention is hereinbeforeset forth, it is to be 5 clearly understood that the invention is not tobe limited to the exact construction illustrated and described becausevarious modifications of these details may be provided in putting theinvention into practice within the purview of the appended claims.

What is claimed is:

1. In a stapling machine of the type having a base with rotary anvilsadapted to extend in the path of staples and beyond the base of themachine, means for rotating the anvils, and means for adjusting thedistance of the base of the machine from materials being stapled.

2. In a stapling machine of the type having a base with rotary anvilsadapted to extend in the path of staples and beyond the base of themachine, means for rotating the anvils, and means for adjusting thedistance of the base of the machine from materials being stapled, saidadjusting means comprising legs adapted to move downwardly from thebase.

3. In a stapling machine of the type having a base with rotary anvilsadapted to extend in the path of staples and beyond the base of themachine, means for rotating the anvils, and means for adjusting thedistance of the base of the machine from materials being stapled, saidadjusting means comprising legs adapted to move downwardly from the baseby means of manually adjustable nuts.

4. In a stapling machine of the type having a base and rotary anvilsadapted to extend in the path of staples and beyond the base of themachine, means actuating the anvils, and means adjusting the distance ofthe base of the machine from materials being stapled, said adjustingmeans comprising a pair of legs slidable vertically in the machine andadapted to be adjusted downwardly from the base by means of nuts screwedon threaded stems.

5. In a stapling machine of the type having a base with rotary anvilsadapted to extend in the path of staples and beyond the base of themachine, means for rotating the anvils, and means for adjusting thedistance of the base of the machine from materials being stapled, saidadjusting means comprising a pair of legs mounted for vertical slidingmovement in said machine and adapted to be extended below said base bymeans of links pivotally attached to each leg, said links beingpivotally attached to a single screw adapted to be adjustably moved bymeans of an adjusting nut for control-ling the degree of extension ofsaid legs.

6. A stapling machine comprising a casing, anvils rotatably mounted inthe lower part of the casing and positioned to extend beyond the base ofsaid casing when rotated, arms fixedly attached to the anvils extendingupward into the casing, means connected to said arms for operativemovement thereof to rotate the anvils to operative positions, meansdriving staples from the casing against said anvils, and means foradjusting the distance of the base of the casing from the materialsbeing stapled, said anvil rotating means and said staple driving meansbeing operated in the sequence that the anvils pierce the materialagainst which the machine is placed, and the staple driving meansthereafter clinches the staples forced through the material and againstthe anvils.

7. A stapling machine comprising a casing, an- Vils rotatably mounted inthe lower part of the casing and positioned to extend beyond the base ofsaid casing when rotated, arms fixedly attached to the anvils extendingupward into the casing, means connected to said arms for operativemovement thereof to rotate the anvils to operative positions, meansdriving staples from the casing against said anvils, and a pair of legsadapted to be adjustably extended from the base of said casing by meansof manually adjustable nuts for adjusting the distance of the base ofthe casing from materials being stapled, said anvil rotating means andsaid staple driving means being operated in the sequence that the anvilspierce the material against which the machine is placed, and the stapledriving means thereafter clinches the staples forced through thematerial and against the anvils.

WERNER SCHAFROTH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,363,640 Campbell Dec. 28, 19201,878,417 Matveyeff Sept. 20, 1932 1,945,377 Posnack Jan. 30, 19342,012,027 Taylor Aug. 20, 1935 2,054,548 Matveyeff Sept. 15, 19362,080,634 Schafroth May 18, 1937 2,153,874 Posnack Apr. 11, 19392,182,594 Matveyeff Dec. 5, 1939 2,234,808 Schafroth Mar. 11, 1941FOREIGN PATENTS Number Country Date 546,715 Germany July 1, 1932 605,297Germany Nov. 8, 1934

